Here’s what I know about having a large platform on other social media sites.
NONE of them drive any traffic to Substack. None.
Less than 1% of my traffic comes from any social network.
You made it, you own it
You always own your intellectual property, mailing list, and subscriber payments. With full editorial control and no gatekeepers, you can do the work you most believe in.
Section of my talk about nonprofits like the American Cancer Society (taking $$ from industries allegedly linked to cancer...in this case antiperspirant industry with studies linking antiperspirants to breast cancer).